A new species of Stelis (Orchidaceae, Pleurothallidinae) from Guerrero, Mexico

Abstract

A NEW SPECIES OF STELIS FROM THE CLOUD FOREST OF GUERRERO, MEXICO, IS DESCRIBED AND ILLUSTRATED AS S. DESANTIAGOI. THIS SPECIES IS SIMILAR TO S. RUBENS, BUT IS DISTINGUISHED BY ITS LARGER PLANTS, THE STEMS PROPORTIONALLY LONGER, THE LEAVES WIDER, THE SEPALS INTERNALLY PAPILLOSE (VS. PUBESCENT), THE PETALS FL ABELLATE (VS. CUNEATE), THE LABELLUM SLIGHTLY ARCUATE WITH THE APEX STRAIGHT (VS. GENICULATE WITH THE APEX STRONGLY INCURVED), AND THE CLINANDRIUM ENTIRE (VS. TRILOBATE). KEY WORDS: CLOUD FOREST, ENDEMISM, GUERRERO, ORCHIDACEAE, SIERRA MADRE DEL SUR, STELIS DESANTIAGOI.